How does this food chain illustrate the law of conservation of energy?

a
It shows how energy stored in food moves from one organism to another.
b
It shows how sunlight is converted into the matter making up organisms.
c
It shows that the energy used by plants for photosynthesis disappears.
d
It shows that energy is destroyed by the last animal in the chain.

a. It shows how energy stored in food moves from one organism to another.

The food chain illustrates the law of conservation of energy by showing how energy is transferred from one organism to another as it is consumed. The energy stored in plants is passed on to herbivores, then to carnivores, and eventually back into the environment as heat energy. The total amount of energy remains constant throughout this process, following the principle that energy cannot be created or destroyed, only transferred.